An investigation of flow characteristics between different mediums

Abstract

Abstract In this research topic, two-dimensional tunnels made of different mediums (including the contrast of gas-solid condition and solid-solid condition and the contrast of solid-solid condition with or without a bump) are designed to compare how they influence the velocity and the pressure of the fluid when the fluid is flowing through them. The Navier-Stokes momentum equation is used to guide the project and set up the equations of motion for these models. At the same time, Newton’s law of viscosity is applied to set the boundary conditions. Numerical methods involving finite differences are used to help discretize those equations and simulate the models in computers. The result shows that the velocity and the pressure of the fluid are influenced significantly by different tunnels settings. A nozzle with or without a bump can also significantly affect the velocity and pressure of the fluid. As the materials of tunnels change, the dependence of these flow characteristics in terms of x and y-direction will change, and the shape of the tunnel will also influence these traits.